41. A user issues the following command sequence:
$ a.out &
$ bash
$ a.out &
If the user kills the bash process, then which of the following is true?
$ a.out &
$ bash
$ a.out &42. What this program is not able to connect with any client program?
#include<stdio.h>
#include<sys/types.h>
#include<sys/un.h>
#include<sys/socket.h>
int main()
{
struct sockaddr_un add_server, add_client;
int fd_server, fd_client;
int len;
char ch;
fd_server = socket(AF_UNIX,SOCK_STREAM,0);
if(fd_server == -1)
perror("socket");
add_server.sun_family = AF_UNIX;
strcpy(add_server.sun_path,"demo_sock");
if( bind(fd_server,(struct sockaddr*)&add_server,sizeof(add_server)) != 0)
perror("bind");
len = sizeof(add_client);
fd_client = accept(fd_server,(struct sockaddr*)&add_client,&len);
printf("Examveda\n");
return 0;
}
#include<stdio.h>
#include<sys/types.h>
#include<sys/un.h>
#include<sys/socket.h>
int main()
{
struct sockaddr_un add_server, add_client;
int fd_server, fd_client;
int len;
char ch;
fd_server = socket(AF_UNIX,SOCK_STREAM,0);
if(fd_server == -1)
perror("socket");
add_server.sun_family = AF_UNIX;
strcpy(add_server.sun_path,"demo_sock");
if( bind(fd_server,(struct sockaddr*)&add_server,sizeof(add_server)) != 0)
perror("bind");
len = sizeof(add_client);
fd_client = accept(fd_server,(struct sockaddr*)&add_client,&len);
printf("Examveda\n");
return 0;
}43. What is the output of this program?
#include<stdio.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<semaphore.h>
int main()
{
sem_t* sem_id;
int value;
sem_id = sem_open("sem_value",O_CREAT,0666,0);
if(sem_id == SEM_FAILED)
perror("sem_open");
if(sem_getvalue(sem_id,&value) == -1)
perror("sem_getvalue");
printf("%d\n",value);
sem_wait(sem_id);
printf("Examveda\n");
if(sem_close(sem_id) == -1)
perror("sem_close");
return 0;
}
#include<stdio.h>
#include<fcntl.h>
#include<sys/stat.h>
#include<semaphore.h>
int main()
{
sem_t* sem_id;
int value;
sem_id = sem_open("sem_value",O_CREAT,0666,0);
if(sem_id == SEM_FAILED)
perror("sem_open");
if(sem_getvalue(sem_id,&value) == -1)
perror("sem_getvalue");
printf("%d\n",value);
sem_wait(sem_id);
printf("Examveda\n");
if(sem_close(sem_id) == -1)
perror("sem_close");
return 0;
}44. Which one of the following is not true?
45. What is the output of this program?
#include<stdio.h>
#include<pthread.h>
void *fun_t(void *arg);
void *fun_t(void *arg)
{
printf("Example\n");
pthread_exit("Bye");
}
int main()
{
pthread_t pt;
void *res_t;
if(pthread_create(&pt,NULL,fun_t,NULL) != 0)
perror("pthread_create");
return 0;
}
#include<stdio.h>
#include<pthread.h>
void *fun_t(void *arg);
void *fun_t(void *arg)
{
printf("Example\n");
pthread_exit("Bye");
}
int main()
{
pthread_t pt;
void *res_t;
if(pthread_create(&pt,NULL,fun_t,NULL) != 0)
perror("pthread_create");
return 0;
}46. The process which terminates before the parent process exits becomes
47. Which one of the following is not a valid shell variable?
48. Which call to use to set the resource count of semaphore?
49. The command "make demo" will
50. The command 'ulimit'
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